Windshield wiper motor



De@ 9,1941- H. G. KELLoGG L wINDsHIELD: wIPER MOTOR 2- sheets-sheet 1 Filed Aug. 29, 1938 INVENTOR HoMER @KELLOGG BY v E WTTORNEYSWL HHHHI IHN Dec. 9, 1941.

H. G. KELYLOGG wINDsHIELD wIPER MOTOR Filed Aug. 29, 1938 2 Sheets-Sheet 2 INVENTOR S n ,N m mT L.T -.A K. GW

R E M O H @MMM thereof.

Patented Dec. S, 1941 UNITED ,STATE s PATENT orllcli.

wINnsmELD wnlzn Moron amer Aci'. Kellogg, Detroit, `Mien., assigner to Motor: Products Corporation, Detroit, Mich.a Y corporation of New York Application August 29, 193s, serial No. 221,412

Claims.

extreme simplicity and economy or manufacture as wellv as `the structural arrangement winch renders it very easily assembled and disassembled. The simplicity of the structure E accomplished withoutfomission of :any important'function by a complete departure from all structures known to the prior art. Y

It is an-"object of the presentvinvention to provide a windshield wiper assembly in which the various major elements are retained in position by a single clamping means,

It is a further object of theinvention to provide a windshield wiper assembly characterized by the employment of a cup sealingly associated with the -rrame so as to provide an expansible and contractable chamber.

It is a furl-.hemmen of the invention repro@ The present construction- 'is .notable forl its.

reversing valve is associated with a reciprocable power transmitting` means such, that Vreverse movement of thevalve is prevented `during reciprocationiof theelement. 1

Itis a further object of the invention to provide in awindshield wiper construction a manual valve which 'is adapted-both to interrupt opera-A tion ofthe motor meansand to retain lthe wiper on shaft inzpredet'ermined position.

It is a further object ofthe invention to provide in a windshield wiper assembly afmanualy valve adapted to be'movedtoy a first position to interrupt operationoi the motor means and to Lbe-moved further inthe same'direction to mechanically move the wiper arm shaitto a predetermined position.

It is a further objectl of fthe invention to provide in a windshield wiper assembly'a manual. valve adapted to be moved'to a first position to decrease the speed o! the motor means to Y prevent vfurther movement of the valve until the j and then' topermit'further movement lof the,

wiper arm shaft is in apredetermined position wvalve Vto completely interrupt operation of the vide a windshield wiper assembly characterizedr by the use of a Ycup member to clamp affiexible diaphragm to the frame so 'asto form an en# pansible and contractable chamber.

It is a further object of the invention toprovide a' windshield wiper assembly characterized bythe association` of two opposed-fluid motors which are assembled and retained in position by' means of a single supporting member.V l

It is a further objectof the inventionto provide a windshield wiper assembly characterized by the association ofV two opposed-motor elei by a power transmittingments interconnected 'element in combination with motor control means carried in part by said element. i

It is a further object of the invention to provide a windshield wiper assembly in which 'an open sided frame is employed,l through the open f side of which access may be had to the control instrumentalities of the device, inV combination with a resilient cover adapted to beV snapped in place overthe frame "It is af further object oil the invention to'pro-y vide a valve in combination with a exible conduitadapted to serve as biasing means `for ythe valve and also as a conduit providing for passage of fluid pressure to the valve.

It is a further object of the'invention to provide a windshield wiper--assembly in which a lio' essentially aframe member 'Il which is open at j close the'open side` motor means and to simultaneously latch the wiper arm shaft ina predetermined position.

vOther objects of the invention willbe apparent 1 as the description proceeds and when taken in conjunctiony with the accompanying drawings, and whereinf- Q v Fig. 1 is a front elevation of my improved coristruction with parts brolen away;

Fig. 2 is a plan view of my improved'construc- 1 tion with parts brokenl away;

Flg. 3 vis a substantially transverse section of my improved windshield wiper assembly;

'.Fig. 4 is a perspective showingV the relation- V- ship between: the valve and the wiper arm shaft;

Y Fig. 5 isan exploded perspective showing the valve structure; v

Fig. 6 is avsection like that of Figure 3 showing a slightly diirerentembodimentof my invention:

Fig. '7 is al fragmentary side'elevationl o!` the `@llamarmen1: shown in Fia;

Fig. 8 is an exploded perspective showingga A detail of the embodiment of Figure 6;

Fig. 9 is a longitudinalsection illustrating yet another embodiment of my invention;

Fig.' 1o 1s a den-.u1A or the tape shown Fig'- f ure 9;and

Fig. 11 is an elevation or thedriun used in the embodiment sh'ownlnFlgure 9.

The assembly shown in-Figs. 1 to 4 comprises the top and front thereof, as best seen in Iig. 3. and which is provided with annular end portions II defining opposed end openings. The frame Il is preferably in the form of a casting and is provided with a central l block I2 in which is formed a channel I2 for a purpose which will presentlyappear. The block h'as a :duid passage I5 formed therein communicating with a nipple I4. A second nipple I5 is formed on the block I2 and the nipple I`5 is bored to provide a passage I1 communicating with the .passage I5 previously rei'erred to. The block I2 is also provided with a tapered recess I5 which interrupts the passage I1. The recess I8 is for the reception of a valve member:

which will subsequently be described.

The block I2 in the frame III is furth'er provided with an aperture Il in which the wiper arm drive shaft is journaled.V

Adjacent the upper portion of the channel I3 is provided a iiat web 2I whichv extends Afor a short distance along the channel Il and is for a purpose which will later be described. f

The block I2 is provided with' a pair of bosses 22 whichl are'tapped for the reception oi bolts. This constructionv provides means for mounting the assembly on the motorvehclcle and, as will be readily understood, may Vbe supplanted by any o'th'er conventional mounting means when rendered desirable by the environment of the assembly..,-

`'I'he wiper arm drive shaft 20 has keyed thereto, as indicated at 22', a gpinion 22 which preferably h'as teeth 2 4 extending only partially about the periphery'thereof. The pinion 23 is radapted to be driven by a meshing rack 25 which is reciprocated by the motor means now to be described.

As previously referred to, the frame I0 terminates at each end in the annular portion I I which denes oppositely directed openings in the frame. A flexible diaphragm 25 has a peripheral bead 21 3l. I have found that the most eiiicient results portion withv an upstanding boss 40, as best seenv formed thereon adapted toi iit over th'e annular portionII of the frame. Thediaphragm 2l in its centralportion isreceived between the plate 28 anda shallow cup 29, the plate 28 and the cup 29 being held in clamping relation at the end of the rack member 25 as by a nut 30, or the like.

The construction of my improved windshield wiper assembly is identical at both ends, and I will therefore describe in detail .the construction of one end -onlyr- It will be understood that the construction at the opposlteyend is identical. r Y

A cup 3| which is centrally apertured as at 32 has an edge 33 which is adaptedto clamp the peripheral edge of the diaphragm 25 to the annularpo'rtion I I of thek frame, the bead 21 cooperatlng with the parts just Adescribed as best seen in Fig. 1.

The edge or lip I3 of the cup 5I, the diaphragm 25 and its bead 21, and the outwardly directed lip of the annular portion II of the frame al1 lnterflt as shown so that when the nut 21 is tightened, a tight seal results, and the cups are rmly retained on the frame against lateral displacement. Y

The rack member 25, previously described, is rigidly secured to the diaphragm 26 through the are obtainedby employing a flexible diaphragm, such as shown in 2li,V but it will be understood that` if desired a piston member reciprocable within .the cup 3| and secured to the rack member 25 may be substituted.

vThe rack member 25 is provided near its mid in Fig. 5, which' serves as a valve seat. The rack member 25 is further provided with a passage 4I (see Fig. 2), which communicates with the interior of the chamber 39. A corresponding passage 42 is adapted to communicate with the chamber 59' corresponding to chamber 29 at the opposite end of my assembly. Passages 4I and 42 communicate with the passages 43 and 44 which open adjacent each other in the top surface of the boss 4|I. Passage 43 opens into a lunar shaped recess 45 and the passage 44 opens into a corresponding lunar-shape recess 45.

A valve 55 is rotatably supported on the valve seat formed by the boss 40 by means of a boltlI and a Adepending flange 5I adapted to surroundV a portion of the boss 40 and is urged against'the valve'seat resiliently as by the spring 52. The valve 50 is further provided .with a nipple 5I which Vhas a passage 54 formed therein which communicates with' recess 55; A short length of resilient tubing 51, preferably of pure gum rubger, interconnects nipples 53 and I6. 'I'he valve 50 is further provided with a recess communieating with an aperture 56' which opens in the upper face of. the valve member.

The valve 50 is adapted to be shifted between two limiting positions, one oi' which is that indicated in Fig. 2 is which the recess 55 communicates through th'e recess 45 which the passages 44 and 42 so that the right-hand chmber 39' is connected tothe source of iiuid presure.4 At the y n thisr term, both aV source of reduced pressure and a source of super-atmospheric pressure.

, The valve 50as best seen in Fig. 2, is provided with a projection or cam surface SII formed thereon. The projection 2I ofthe frame previmedium of the plate 25 and the cupl 25 and is provided with a central aperture 34. 'Through this aperture 54 a rod 25 isadapted to be slidingly received. The rod falso passes through the aperture 32 in the cup member 5I and is provided at its outer ends with threads, indicated at 38, for cooperation witha clamping nut 31. A

A suitable sealing gasket J8 is provided.

ously referred to is adapted to cooperate with the projection to assist in controlling movements ofthe valve 50. Y Y l It will be understood the valve 50 being carried by the reciprocable power transmitting mem'- ber 25 moves therewith4 relative to the upwardly projecting flat plate 2I.- In the position'sh'own in Fig. 2,the resilient tube 51, due to its own resiliency, has rotated the valve 5lito the position shown.` Y, Y

In this4 position the source of reduced fluid pressure,vwhich as previously described may be the manifold of the vehicle, is connected through the flexible tube 51, the recess 55, the recess and passages 44 andV 42. to 'the chamber 39' at the right-hand end of the mechanism. .At the same time the chamber 29 at the leftA of Fig. 2

`valve 50 snaps clockwise tained ughuy thereon, dus to its own inherent communicates through passages 4I and 43, recess 45, recess 56 and the passage 58' to atmosphere. Under these circumstances atmospheric pressure acting on the diaphragm 26 at the left of Fig. 2'exerts a greater force thereon than does the reduced pressure in chamber 39' at the right in Fig. 2..-Under these conditions, the power transmitting element 25 moves to the right carryingv the valve 50 therewith. During the initial movement, the valve is maintained at substantially the position shown in Fig. 2. However,- as

. this movement of the' power transmitting member-continues so that thenipple 5 3 'is carried to the right of nipple I6 the resilient tube 51 tends to turnthe valve in aj'clockwise direction.

The projection BI! formed on the valve Silen- Vgages the surface.' of the projection 2 I :jalmost immediately upon initiation of its movement to the right in Fig. 2.' Throughout its movement thej projection 60 bears against the projection 2| and is thereby prevented from rotating in a clockwise direction. The projection 2| is proportioned so that just prior to completion of the movement of the power transmittingV member 25 and associated parts to the right in Fig. 2, the projection 60 of the valve slips oi the right-hand edge of the member 2|. At this time a substantial force has been built up, Y

ent tube 51, with the result that as soon as the projection 60 is released from theeplate 2l the position.

.As formed. the valve passages both in the valve seat formed at the top of boss 40 and inthe valve member 50, terminate at' their engaging surface in lunar Ishaped recesses, as previously described. Due to this, it is unnecessary that the valve be moved to a predetermined position, since when the valve is moved to approximate position the lunar shaped recesses will overlap substantially and provide a substantially unrestricted passage. It is -thereforeunnecessary to provide 'exactly predetermined stop means for the valve with the result that the motor will operate more quietly. In motors gf this type, where avvalve member is snapped between predeterminedpositions and -is brought lto rest by engaging stop means, there is unavoidably caused a certain amount of undesirable noise.-

As best seen in Fig. 3, a manual valve 6 I which is tapered to fit snugly withinthe conical recess I8 is provided. 'Valve member 6I has a passage 62 formed therein, the passage 62 being adapted when the valve is rotatedto proper position to connectthe portions of passage I1 above and to aj predetermined e resiliency.

I take advantage of the resiliency of my cover plate to perform -another important function in my assembly. As best seenin Fig. 3, the cover plate at its forward edge is provided with Aa slot 66 which is adapted to pass over the stem V61 of 'e the valve 6I.- At the same time, the slot 66 is Fig. V3, aswill readily apparent, the cover plate 12 which is adapted to cooperate with the lateral due to distortion of the resiliof less width than the'large end of the valve plug 6I. With the parts assembled as shown in around theslot :66 bears against the 'valve plug f 6I and tends. to retain the same tightly inv its seatfl. -In order to removeV the valve 6I, it is only necessary tov lift the cover plate 62'` upwardly after which the valve may be withdrawn directly.

The manual valve '6I performsI another important function, as will now be'described. The

wiper arm drive shaft'2ll at vits inner end has a lateral projection 10 formed. thereon forv which a recess .1I is provided, communicating with `the tapered valve seatfl. 'The' valve plug '6I hasV formed thereon an eccentric key or projection projection 10. With the parts'as shown in" Fig. 3, it will be noted that the projection 12 is in lowermost position, whereas projection`10 is in uppermost positio'n. Y.

As is conventional in windshield wipers, the wiper arm drive shaft 20 is adapted to :oscllate through an angle less than 180. Inother words, in'nrmal operation the projection 10 'willsiscillate in either direction from the upright -posi- Vtion shown .in Fig. A3 tof'position's'somewhatless than 90 to either side thereof.V These two limiting positions will be the positions ofthe projection 10, which corresponds tothe extreme positions of the wiper arm carried by the shaft 20, as will readily be understood.

VWith the wiper arm in normal operation, if the button 63 isturned so that the passage 62 no longer interconnects the separated portions below the conical recess I8. AY button 63 is proy vided, the edges of which are knurled to facilitate manual manipulation.

Oneof the important features of the'construction of my improved windshield wiper assembly is that the frame has an opening 64 at its side above the valve 6I. Thi`s-opening 64 provides for access to the interior of the casing for inspection and adjustment. In order to close the opening 64 when the device is to be used, a resilient cover plate 62'v is provided. This cover plat-e is preferably made of thin sheet metal and is formed as best seen in Fig'. 3 so as to embrace slightly more than 180 of the generally cylindrical frame. Due to this construction, the cover of the passage I1, the motors will stop'. Y .The position in which the motors stop is'notpredeitermined and will correspond'totheir instantaneous position when the manual valve-'is operated. f

It is highly desirable vthat the windshield wiper blade upon interruption of its operation bemoved to and'retained in an inoperative position, pref- Aerably in a limiting position so that thewiper blade.will not interfere with the vision of'the y operator of the vehicle. In my improved Vc'onstruction this yis providedfor in'a very simple manner by the projections 10 and 12, previously referred to. l n

The first rotation of the manual valve 6I interrupts operation of the motors and a further i turning of the button Blbrings the projection 12 into engagement with the projection 10 Airrespective of the position at which the wiper arm-is stopped. Continued 'rotation of the button 63 through' the inter-engagement of the projections 10 and 12 results in a manual rotation of the drive shaft 20 until it reaches limiting position. It will be appreciated that this may'be accomplished by rotating the button 63 in either direction so Vthat the wiper arm may be parked in 'ioy eitherlimiting position as desired. y

In the event that vthe wiper blade is moved,

as often happens when the attendant at a gasoline station wipesthe windshield,this results merely inA theturning of the button 63 and it is then only necessary for.the operator of the vehicle to return the wiper blade to parked posltion by rotation of the button 53.

A second embodiment of my invention is illustrated in Figs. 6 to 8, inclusive, in which' a somewhat different arrangement is provided for movable means to the pinion 23. It will be appreciatedthat if desired the pinion 23 and member 15 may be combined as a single integral member. Y

The block I2 of the frame in this modification is'provided with a cylindrical bore 16 fory 4the reception of a cylindricalpush-pull type valve 11. The valve 11 is provided with a passage 62' which serves to interconnect the portions of the passage I1 separated by the bore 16. In the position shown in Fig. 6, Ythe valve is in open position and pressure is being supplied through the iiexibletube 51 to the valve 50. l

.The member I5 isv provided Vwith a projection 18, .best seen in Fig. 8.. A recess 19 which corresponds in shape with the projection I8 is formed inthe end `of the valve 11. Projection 18'has .tapered sides 80, andthe sides 8I of the slot119 arecorrespondingly tapered for a purpose which will presently appear. Y

Inaddition to the passage 62', the valve 11 is provided with a tapped hole 82 for the reception of a bolt 83,.as seen in Fig. 8.l The bore 16 Vis surrounded adjacent its end with a bushing indicated in Fig. 7 by the numeral 84. This bushing is provided withV a longitudinal slot 85 rforY the reception of the bolt 83.k As will be readilyv understood, the slot 85 cooperates with the bolt 88, prevents rotation of the valve 11 and cured to theY shaft and is interlocked by suitalso limits its movements. If desired, thewslot 85 may be open at one end of the bushing'so that .removal of the bolt is not necessary in order to remove the valve. l

The valve 11 is adapted to-be reciprocatedto control the supply of fluid pressure to the motors and also to locate the wiper arm in parked position. This is accomplished as follows: With the parts in the position indicatedin Fig,.6, the valve Y11may be pushed inwardly substantially interrupting communication between passage 62 and I1. In order that this interruption will not be complete, the valve is provided withshort tapered portions 86 communicating with the passage 62' ySince with the parts in the positionV as shown in` Fig.`6, the projection 18 is not in alignment with the slot 19, the parts will engage beforethe passage I1 is closed. The partialclosure of this passage, however, will reduce the rate of operation of the motors with the result that the windshield wiper will approach parked position relatively slowly. As soon as the` projection 18 becomes aligned with the recess 19 the valve may be pushed further. inwardly simultaneously completely interrupting the ow of fluid through passage I1 -and blocking thewiper arm drive shaft 20 in parked position.

'an extremely simple manner.

Due to the inclined sides of the projection 'I8 and the correspondingly inclined sides 8l of the slot 19, forcible displacement of the wiper arm drive shaft, as for example in cleaning the windshield, will cause the valve TY to be moved slightly outwardly Without damage to the parts. It willpbe understood that the resilient .cover 65 in this modification does not engage the valve 11, the slot 66Y therein being substantially larger than the diameter of the valve 11.

By means of this construction a Windshield Wiper in which the blade may be mechanically parked in predetermined position is provided in The number of parts is reduced to a minimum and the parts as designed may be produced economically.

' A modification of the'means for transmitting power from the motors to the drive shaft is illustrated in Figs. 9 to 11. In these figures a mecha,- nism is illustrated in which v a tape and drum drive is substituted for Ithe rack and pinion drive previously described. Fig. 9 shows the essential parts of the mechanism. Since this figure diiers only in the power ,transmitting means it will notl bedescribed in detail. The power transmitting member 25' which corresponds to the rack 25, shown in Fig. 1, isv not provided with rack teeth, but instead has secured yadjacent its ends a tape 90, shown in detail in Fig. 10. The tape is bolted as indicated at 9| to the power transmitting member' 25 and at its central portion is wrapped about a drum 92 showny in detail in Fig. l1. .The drum` 9 2 iskeyed or ,otherwise secured to the shaft 20 and is adapted to be r`oV .,tated by the tape9II. For this purpose a lug or. projection .93Y is formed'on the drum which is adapted tobe received within an aperture 94 formed centrally in the tape 90. In order to preventinterference between the two ends of the tape, theyare laterally offset, asA indicated in Fig. 10, toprovide lportions 95 and 96, which when Wrapped about the drum 92 will be laterally or axially `spaced from each other. In this modification the parts not describedA in detail are F identical to those previously described. Itwill be understood that either the 'push-pull type valve or the rotary type valve maybe employed.

. The foregoing Vdetailed description has been given forclearnessand vunderstanding only, and no unnecessary limitation should be understood therefrom.

What I claim as my invention is:

1. In a Windshield cleaner, a frame terminat-4 ing in an annular portion defining an opening. said frame having away formed therein for a part reciprocable toward and 'away from said opening, a diaphragm peripherally engageable with said annular portion, a cup having an edge adapted toxinteriit against lateral displacement with said annular portion and diaphragm, and to clamp the diaphragm therebetween, a rod extending through said frame, means securing said -rod-against longitudinal movement in said frame,

a part reciprocable in said way, slidable on Vsaid rod, and secured centrally to said diaphragm, said rod being secured to said cup and serving as the sole means to retain all of said parts in assembled position and to retain said cup in sealed relation to said diaphragm. f

2. In a windshield wiper motona frame'having Y openings at opposite ends, a diaphragm at each endof said frame` covering said openings, an inwardly open cup at each end of said frame.

said frame openings and saidcups having edge therein, a reciprocable portions adapted Ato interfit so as to preventI lateral displacement of said c ups relative to said openings, a diaphragm over each opening having a peripheral portion sealinglyclamped between said edge portions, a single rod extending between said oups, means on sa'd rod engaging said cups and serving as the sole means said cups over said peripheral phragms and against the frame.

3. A windshield wiper motor comprising a frame havingoppositely directed/openings and having an open-sided guideway intermediate and aligned with said openings, an elongated drive element in said guideway, said element and said way being formed to permit longitudinal movement of said element in said way and to prevent turning of said element in said way, phragms over the open ends of said frame, inwardly open cups over said diaphragms and sealingly engaging the peripheries of said diaphragms between the edges of said cups and the edges of said openings, said drive element having its opposite ends secured to said diaphragms, a longitudinal opening extending through said element, a rod extending through said longitudinal opening to retain said element in said open-sided guideway, and secured at its ends to said cups.

4. A windshield wiper motor comprising a frame having an open-sided guideway formed drive member in said guideway, a driven shaft mounted in said frame and operably connected to said drive member, a pair of cups seated against said frame in alignment with said guideway, pressure-actuated elements in said cups connected to opposite ends of said drive member, said drive member having a longitudinally extending opening therethrough, and a rod extending through said opening, secured at opposite ends to said cups, and adapted to retain said drive member in said open-sided guideway. Y

A 5. In a windshield wiper motor, a frame having a relatively deep recess therei and an openslded guideway communicating with said recess, a pinion in said recess, a rack slidable longitudinally in said guideway and meshing with said rack, cups seated at opposite ends of said frame in alignment with said rack and defining portions of expansible and contractable chambers, pressure-actuated elements in said chambers connected to opposte ends of said rack, said rack having a longitudinally extending opening, arod extending through said rack in said guideway, and clamping means at the ends of said rod engaging said cups to retain said cups seated on said frame.

6. A windshield wiper motor comprising a frame having openings at opposite ends defined by outwardly extending lips, flexible diaphragms closing said openings and having thickened peripheral beads located outside said lips, inwardly open cups over said diaphragms having lips enportions of dia- Y gaging inside said beads, said cups and diaphragms forming closed, expansible and contractable pressure chambers, a drive element for clamping flexible dia-- opening to retain said transmitting member openings, with said drive element having interconnecting said diaphragms, a longitudinal opening, a rod extending through said longitudinal opening, and clamping means at the ends of said rod engaging saidfcups and clamping said cups in sealing relation against said diaphragms.`

7. A windshield wiper motor havinga frame, operating means on said frame, a removable, manually operable control valve extending from said frame, a resilient cover adapted to snap over said frame to conceal said operating means,

said cover having a slot portion adapted to engage an intermediate portion of said removable valve to retain the same resiliently in its seat, while exposing a portion of'said valve for manual operation with said cover in placel 8. A windshield wiper motor comprising a frame having a recess therein, a removable, manually operable control valve rotatably mounted in said recess and having an operating portion extending from said recess, operating mechanism on said frame, a resilient cover adapted to snap over said frame to conceal said operating mechanism, said cover having a' slot portion adapted to engage anintermediate portion of said control valve to retain the same resiliently on its seat while exposing the manual operating portion thereof.

9.' A windshield wiper motor comprising a frame having openings at opposite ends surrounded by outwardly extending lip portions and having a longitudinally extending, open-sided guideway in alignment with said openings; peripherally beaded, exible diaphragms over said the beads thereof located outside said -lip` portions; inwardly open cups having inwardly extending lip portions adapted to seat inside the beads of said diaphragms, and to interfit therewith and with the lip portions of the frame so as toprevent lateral displacement of said cups on said frame; a' drive element slidable longitudinally in said open-sided slot and secured at its ends to said iiexible diaphragms, a longitudinal opening therethrough; a rod extending through said longitudinal opening and engaging said cups, whereby said rod secures said cups in sealed relation with said diaphragms and in aligned relation with said guideway. said cups thereby locating said rod against lateral movement on said frame, and said rod thereby retaining said drive element in said open-sided guideway.

10. A uid motor comprising a frame having oppositely directed openings; inwardly open cups fitting against lateral displacement over said openings; centrally apertured pressure actuated' elements in said cups; an intermediate power interconnecting said elements, said member having an aperture registering with the apertures in said elements; and a rod passing through the openings in said frame and the apertures in said member andsaid elements, and engaging said cups to retain said motor in assembled position.

HOMER G.

KEILOGG. 

